wall -- send a message to everybody's terminal.
SYNOPSIS
wall [-n] [ message ]
DESCRIPTION
Wall sends a message to everybody logged in with their
mesg(1) permission set to yes. The message can be given as
an argument to wall, or it can be sent to wall's standard
input. When using the standard input from a terminal, the
message should be terminated with the EOF key (usually
Control-D).
OPTIONS
-n Suppresses the normal banner, changing it to
"Remote broadcast message" This option is only
available to root, and is used by rpc.walld.
SEE ALSO
mesg(1), rpc.rwalld(8).
AUTHOR
Miquel van Smoorenburg, miquels@cistron.nl
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